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How to see if there's DC at my AC outlets?

Can I simply take a voltmeter, set it to DC, to see if there's DC on my AC lines?

I have Joule Electra monoblocks with an external variac, and it has a tendency to hum / buzz rather loudly at times. I am wondering if its related to DC being present at the outlet. It's not due to ground loops, that I can tell.

Thanks!
1markr

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theo's avatar
theo
2,655 posts
 
1ST Setting your voltmeter to DC and plugging it into and AC outlet will probably smoke the unit.
2ND Direct Current is not ever present in Alternating Current line nor visa versa
3RD Try isolating the amp or another outlet. Have you tried a cheater plug elimnating the ground?
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